Extremely rough cut refactoring: move `RsSnippet`, `RsTypeKind`, and so on to `rs_snippet.rs`.

There's a couple unrelated functions that needed to be moved as well, but I left that as a TODO to refine further.

The idea here is to, well, at least make things less enormous. I couldn't move all the tests over, but this is still something like 10% of the file, give or take. And even this CL was enough to _hang my IDE_ because apparently our tools don't scale to files 5-10KLOC long....

I think further refactorings are possible, in the realm of, like, moving generate_func to a different file than generate_record. That will be much more productive in terms of reducing the size of src_code_gen.rs. This attempt -- well, this CL makes me feel better about making RsTypeKind more detailed. But as an experiment for refactoring src_code_gen.rs, it was mostly a failure, sadly.

PiperOrigin-RevId: 597362421
Change-Id: I222b20626f2446343779b79b18166d36d07c8a5c
4 files changed
tree: 247b43dc96b697e65d1e020a3ec3915dae4b0a4d
  1. .bazelci/
  2. bazel/
  3. cc_bindings_from_rs/
  4. common/
  5. docs/
  6. examples/
  7. features/
  8. lifetime_analysis/
  9. lifetime_annotations/
  10. migrator/
  11. nullability/
  12. rs_bindings_from_cc/
  13. support/
  14. .bazelrc
  15. .gitignore
  16. BUILD
  17. Cargo.lock
  18. CODE_OF_CONDUCT
  19. CONTRIBUTING
  20. LICENSE
  21. README.md
  22. WORKSPACE
README.md

Crubit: C++/Rust Bidirectional Interop Tool

Build status

Crubit is a bidirectional bindings generator for C++ and Rust.

Please don‘t use, this is an experiment and we don’t yet know where will it take us. There will be breaking changes without warning. Unfortunately, we can't take contributions at this point.

Crubit allows for C++ code and Rust code to call each other without manually wrapping the APIs in an FFI-friendly interop layer. For example, a C++ function like this:

bool IsAbsPath(std::string_view path);

... becomes callable from Rust as if it were defined as:

pub fn IsAbsPath(path: std::string_view) -> bool {...}

Crubit automatically generates ABI-compatible bindings for structs (which can be passed both by value and by reference), functions, and methods, for a large variety of types. (Trivial types, nontrivial types, templated types, etc.)

Building Crubit

$ apt install clang lld bazel
$ git clone git@github.com:google/crubit.git
$ cd crubit
$ bazel build --linkopt=-fuse-ld=/usr/bin/ld.lld //rs_bindings_from_cc:rs_bindings_from_cc_impl

Using a prebuilt LLVM tree

$ git clone https://github.com/llvm/llvm-project
$ cd llvm-project
$ CC=clang CXX=clang++ cmake -S llvm -B build -DLLVM_ENABLE_PROJECTS='clang' -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=install
$ cmake --build build -j
$ # wait...
$ cmake --install build
$ cd ../crubit
$ LLVM_INSTALL_PATH=../llvm-project/install bazel build //rs_bindings_from_cc:rs_bindings_from_cc_impl